Digital squelch tail system and method for same
US5615412A · kind A · utility
6Cited by
12References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1995 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | Jul 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/347
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital squelch tail system (120, 114) selectively attenuates audio output corresponding to a digital signal (156). A bit error rate estimator (210) generates bit error rates (201) for an input digital signal (156). A digital filter (220) coupled to the bit error rate estimator (210) outputs an error variation rate (202) related to a rate of change of the bit error rate. Audio output derived, at least in part, from the digital signal (156), is selectively attenuated with an attenuation rate based on the output (202) of the digital filter (220).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.